<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>
<body>
  <script>
    var arr = [0, 1, 5, 10, 15];

    arr.reverse();

    console.log(arr);

    arr.reverse().sort();

    console.log(arr);
  </script>
</body>
</html>